This is what i've done so far:Evaluate the integral

Hint: Write the integrand as an integral.

This was to just get my bearings with what the integral should look like.

In double integral form, the initial integral is:

Call the region we're integrating over R.

Let and .

.

This gives:

Integrating by parts gives:

Firstly, is this answer correct?

Secondly, is there an easier way to do it than this??